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Optical Data Signal Encryption and Decryption Method in Optical Fiber Communication System

An optical fiber communication system and optical signal technology, applied in the field of optical communication, can solve problems such as easy loss of confidentiality, time-consuming, complex operation of encryption technology, etc., achieve high response rate, reduce the difficulty of promotion, and avoid the effects of electronic bottlenecks

Active Publication Date: 2015-10-21
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an optical data signal encryption and decryption method in an optical fiber communication system, which mainly solves the problems that the existing encryption technology is complicated to operate, takes a long time, is easy to lose secrets, and is difficult to meet the real-time requirements of optical fiber communication

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  • Optical Data Signal Encryption and Decryption Method in Optical Fiber Communication System
  • Optical Data Signal Encryption and Decryption Method in Optical Fiber Communication System
  • Optical Data Signal Encryption and Decryption Method in Optical Fiber Communication System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1: When the wavelength of the optical signal pulse sequence is the same as that of the optical key pulse sequence

[0059] 1. Encryption part

[0060] Such as figure 2 Shown is the schematic diagram of the encryption part

[0061] 1. Generate a single-wavelength ultra-high-speed optical signal pulse sequence, denoted as optical signal 1.

[0062] plan 1

[0063] (1) Generate N rate f 0 low-rate electrical signals;

[0064] (2) For N rates f 0 The low-rate electrical signal is time-division multiplexed, and the generation rate is N*f 0 high-speed electrical signals;

[0065] (3) The high-speed electrical signal is input into the electro-optic modulator as a control signal to modulate the intensity of the continuous optical signal, and the optical signal output by the electro-optic modulator has a rate of N*f 0 Single-wavelength ultra-high-speed optical signal pulse train.

[0066] Scenario 2

[0067] (1) generating N low-rate electrical signals with...

Embodiment 2

[0106] Embodiment 2: When the wavelengths of the optical signal pulse sequence and the optical key pulse sequence are different

[0107] 1. Encryption part

[0108] The generation of the optical signal pulse sequence, the generation of the optical key pulse sequence, and the synchronization control method in steps 1-3 are the same as those in Embodiment 1, and are omitted here.

[0109] 4. Execute all-optical XOR on the optical signal 1 and the optical key 1 to generate an optical ciphertext pulse sequence, which is denoted as optical ciphertext 1.

[0110] Scheme 2 is based on Mach-Zehnder interferometer structure 1 (such as Figure 9 shown)

[0111] In this case, optical key 1, optical signal 1, and continuous optical wavelengths are different from each other.

[0112] (1) The continuous optical signal sent by a light source is divided into two optical signals with the same power by using a fiber optic beam splitter

[0113] (2) The optical signal 1 is coupled with one o...

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Abstract

The invention provides an optical data signal encryption and decryption method in an optical fiber communication system, which mainly solves the problems that the conventional encryption technology is complicated in operation, costs long time to implement, is easy to cause secrecy leakage and cannot meet the real-time demand on optical fiber communication easily. The encryption and decryption method is based on a stream cipher mechanism and is used for encrypting an optical signal pulse sequence through an all-optical exclusive-OR gate; and as the all-optical exclusive-OR gate needs no photoelectric conversion and completely finishes the exclusive-OR operation of an optical signal within an optical domain, the limit of an electronic bottleneck is avoided, and a quite high response speed is achieved, so that the encryption and decryption method can be used for performing real-time encryption and decryption on the optical fiber communication. Besides, the optical data signal encryption and decryption method provided by the invention is compatible with the technical mechanism of a current optical fiber wavelength division multiplexing system, so that the method can be directly applied on the premise of not changing the current optical fiber wave division multiplexing system, and the generalization difficulty of the method is greatly reduced.

Description

technical field [0001] The invention relates to an encryption and decryption method, in particular to an optical data signal encryption and decryption method in an optical fiber communication system, and belongs to the technical field of optical communication. Background technique [0002] Foreign optical fiber eavesdropping technology is becoming more and more mature, and the optical signal in the existing optical fiber communication system in my country has not undergone any encryption processing, so when the optical fiber link is eavesdropped, the information carried by the optical signal is easily deciphered by the eavesdropper. [0003] Aiming at the risk of information theft in my country's optical fiber communication system, there is an urgent need for an optical signal encryption scheme that can be applied to existing optical fiber communication systems. The current optical encryption methods include quantum cryptography, chaotic cryptography, double random phase enc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/22H04B10/524H04B10/548
Inventor 谢小平段杰赵卫段弢钱凤臣胡辉汪伟冯欢
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI